[GSOC] `optuna` suggestion service logic update #1913

Job	Run time
Publish Image (file-metrics-collector, cmd/metricscollector/v1beta1/file-metricscollector/Dockerf... / Publish Image	6m 50s
Publish Image (katib-controller, cmd/katib-controller/v1beta1/Dockerfile) / Publish Image	14m 15s
Publish Image (katib-db-manager, cmd/db-manager/v1beta1/Dockerfile) / Publish Image	4m 47s
Publish Image (katib-ui, cmd/ui/v1beta1/Dockerfile) / Publish Image	42m 36s
Publish Image (tfevent-metrics-collector, cmd/metricscollector/v1beta1/tfevent-metricscollector/D... / Publish Image	6m 40s
	1h 15m 8s

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